conductive lampblack is very useful in the production of bridgeless igniters these can be mass produced from ribbon cable.
i had purchased a 4kw diesel chinese heater . These have a drip feed pump and glow plug combustion chamber a12v fan blows hot air out for use in vehicles etc I was far too mean to spend money on diesel fuel so i ran it on kerosene central heating oil . after 5 hours running it stopped and would not ignite fuel.
i unbolted the combustion chamber the chamber was totally filled with about a cup full of high quality conductive lampblack i emptied the chamber into a secure jar. on reassembly the heater works well -no damage .
commercial production of conductive lampblack was from kerosene many years ago , its main use in industry today is making conductive rubber
bridgeless igniter composition uses cmc a water based binder carboxyl methyl cellulose is found in cake shops as an additive when icing cakes if it isnt available then wall paper paste is a suitable alternative the small quantities of anti fungal present do not affect its combustion